Water-heater.



l i I B. RUUD. WATER HEATER.

PPLwATxou FILED JAN. 6. 1900.

Patented NamV 3 19128A 2 SHEETS-SHEET 1.

W l @14M B. RUUD,

WATER HEATER.

nrmouros FILED un. e. woo.

903,007. Patented Nov.3,1908,

3 SHEETS-SHEET z.

ne eosgoova in the count EDWIN l. .'UD, 0F PITTSBURG, PENNSYLVANIA.

WATER-KEANE Toioll,makenuitl moment:

4,.Beyt.;lmoiwn-t at I, EDWIN, RUUD, of

Stateoff. emaylvenia., ave invented a cer-A tainemwmdfnseful Improvementin Waterh Heaters,- of which, improvement the. follow un-1i; aspecification..

- Vpireaellt mventionrelatesimore particu.- larlyto, automaticwater-heaters desiged te heat water'to be uaediaslhot water edo masticor other purposes or to heat the water to. convertrthe saine into`steernhfein power, heating,- or other piu-pom They articula-r form ofheater herein chosen tai ustrata -issued tome-under date ofv theinvention. is of neral .clase orty which is exemplified in teraPatentoit e United States No, 610281,; runterland ptexnber 6 1898, butiaalsoaplicableqiny otheptypesvot ther-.mollyl regulated?- and its object is torovide eectve-andre.-

liable means1-where y. waste of gas,during. heatA periods im which itiis not desired-4to water, may be prevented, and liability'. to damagetothe .heating appliance or its connections, bythe application of heatin the absencev of a, properi suppl? off'water, or by the exeessiveapication o heatwhenwatev is netdraivnogfrom the heater, due to thestia-king offthie` water valve mechanism, may -be efectuall obviated.Thel inventive idee. is capable o. being embodied ina variety ofmechanicalstructures, one of which., fonthe purpose offillustration, isshown in the. accom-panyin drawings, but it is to be expressly unrestoodthat said drawings areV designed for the purpose of illustration onlyand notfr tile) purpose of definin the limits of the inventi In,reerencebeingfud to the claims for that purpose.

'The im rovement claimed is hereinafter fully set orth. y l

In saiddrawings: Figure 1 is a. vertical central sectionthrough a waterheater illus-v tration,r an application `o,my= invention., amil- 2 and3, similar sections through modified forms oLthe Water supplycontrolling mechanism..

lVy-` invention is herein shown 'as applied in. nnautomntic waterheatingr ap aratus, the .water receptacle of which is in t e form of a.coil of pipe, 1, onev of the terminals of which is connected, by' anelbow, 1, t/i a water inlet pipe,.1", and theother to a tube, 12, whichs, in turn, connected to anou-tlet pipe, 12a, leading to n. desiredpoint'lof delivery,

speculation of meer natalia" animen nu :umn-y e, anni.fr "ieee metia.

of Allegheny and'l ga heating apparatus,

Patented 3," 1.908.-

auch as sp' 12?. It will be obvious that, if preferr thetube, 12, m' htbe interposed.- betweentwo sections oV the coil, 1,

asin Letterefatentl, aforesaid, The.

coil,1, which is supported on a oase or stand, .3, is heated by a malingas burner or burners'. 4 ignited, by theitlame of an auxiliary li lit--ingoi: pilot burner, 5aml gee i's supp ied to-,all,.oi'saidburnersffrome. service ipe 6.

The pilot burnerz-v- 5, isconnccted directly with the service pipe,6byta branch supply pipe, 11, and the main burner's,`4, are, connc'ted,by a branch supply pipe, 10, with av beE described.

The waterinlet pipe, l", of the heater coil, 1, leads into the lowerend. of a valve Casin 55to thel u i: end offwhich is conA nocte a-watersup y pipe, 56, leading troni a, source. of watersupply underlsuliicient pressure` to, eilect the` traverse of water,

through` the. coil, 1. Communication bef tween the'pipes, 56,-and- 1".,is controlled by al piston, 57, Working in casing, 55, and constantlysubject to the preesurein the sup- `onlyperforms the function oi apressure element, but alsoy acts, in and of itself, as a water! supplyvalve, when moved suliciently downwardl bp theupnessure of Water on itsupper side, it, in such case, uncovering recessee,\58,in the bore oftheV casing, 55, 'tlnough which water is admitted from the 4supplyy pie556, to the inletfpipe. l", and Said piston may, however, ifpreferred,A be employed to actuate an` independente weten Supply valve,57', as shotvn im Figrzf?lr andv 3,x and such a construction is,`unglenmy invention, the mechanipal equivalent of an integral'piston andwater supply jvalv i T Ae gasservioe ber-creasing. 59, w lich ispreferabl formed integral with the casing, 55, o1ft e Water su ply valvepiston 57, but which may be in ependent thereof, and a gas supply valve,seating on a partition in the casing, 59, controls communication betweenthe ,las service pipe 6, through the-casing, 59, and n chamber, 7,connected to or forming part ofsaid casing. A gas regulating vulve, 7,

As shownin, Fig.. 1, thepiston, 547, not

tpe, 6, leads into 'a chamcontrols communication between the nhumber, 7,und a chamber, 7b, from wl'zich latter chamber the ln'nneli gne supplypipe, 10, leads to the ninin burners, 4. The piston 57, is fixed upon nrod erstem. 6i, und the uns supply valve, 60,'is lined upon n. steiniii-5, nud .scid stems nre connected, by links U--i and (i5,respectively, to opposite endo of n. lever, (Sli. which is pivotedcentrally upon n .suitnble stond or hearing, 67., The opening movementof the water vulve piston, 57, being downward, and that of the geesupply valve, G0. upward, it will be seen .that seid valves aresoconnected that their opening movements are coincident and their closingmovements .are also coii'icidentAv Av closing spring, (32, beurs uponthe top of the ges supply vulve, GO, Said spring acting in opposition tothe pressure of water upon the Water vulve piston, 57, and serving tosent the gas supply vulve when Suid preS-s'sure is insnliicient toovercome its teneion.

Figs. 2 and 3 illustrate constructions in each of which the piston,67,is. es in the instance first described, subject to tlie pressure ofwriter in the supply pipe, 56, but instead or" also acting' as the watersupply juive, it, in this case, actuates an independent water su plyvalve 57a. As shown inA Fig. 2the valve, 57", is located below thepiston, and controls direct `l:ommunicntion between the water supplypipe, 56 and the interior ofthe valve cesing,.55, to which the inlet 1b,is connected. The valve is nnsente the downward movemcntof the iiston,57, to which pressure from the supp y pipe is imparted through a lateralpassage, on the casing, and is returned to its scat by a spring, 57". Inthe construction shown'in Fig. 3, the Water supply pipe 56 lends intothe valve canin between the piston, 57, and the water supp y valve, 57,and said valve, which controls, communication between he casing and theinlet pipe, 1, through a luterel passage, 55", on the casing, isunseated hy the contact of a collar, 61, on. the piston stem, 61, and.is seated'by a spring, 57", interposed between and bearing on the pistonand the valve. embodying the Senne operative* principle, will readilysuggest themselves to thcee. skilled in the art, und muy he mad'cWithout departure from the essentiel features of my invention.

The gris regulating valve, 7, is actuated 'P by n thermostat; or thermalregulator, of any ngo y Other structurel variations,

suitable and preferredconstruction, which? in this instance, is 'shownas consisting o the tube 12, which is connected to the water heatercoil, l, n' tube 13, whichis located within the tube, 12, and is formedof metal having :t comparatively high coefficient of expansion.

l tre-:f :at the otherA enf? cooper metal than the tube 13, und whichprojects; at one end outside of the tnbesglf: und 13. The projecting end'of the rod, il, beers n vainsn pivoted level', l5, the free end of wlich cnrs against on adjustable set screw 1(l,'enfga.ring n thread in nlever, 16, 'which in pivte at one end, by, a pin, 16", to n bioiehct orSupport, 16. The lever, 1.6, beurs, adjacent to its free end, against anut, 17, wlich is adjustable on the stein. 18, of the ga. regulatingvnlvig, und. o spring, 1S), hcnrson the vulve, 7, with a constanttendency to move it tovvnrds its sent, such tend cncy being connternctedby tinl contraction of the tube, 13, under reduction of temv )erm turc,which contraction, acting throng: the rod, 14, und the lever systemnponwhich said rod bears, moves the gas recrulnting valve, 7 ,"to a. greateror less extent rom its seat.

vThe specific form or construction of ther mostat above described, whichis., substan tinlly similar toV that setv Vforth in Letters Patent No.610,281 aforesaid, is not of the essence of my present invention, andthe seme is equally applicable in connection. with lother thermalreuleting mechanisms which operate to'contro the supply of heatingmcdinm to burnere by effecting movements of a regulating valve.

Inasmuch as the function of the gas snpply valve, 60, is to fully openvor to completely close, as the case may he, communication between4 thegas service pipe, 6, and the moin burners, 4, without effecting regulation or graduation ofxsupply, while that of the as re latin valve, 7,is to regulate or gra uate t e supp y of as to the main hurners duringthe periods m which theV supply valve, 60, is open, it will be seen thatthe relative position of said valves, and 7, in the line gli su plytothe main burners, is imniateriu e lgulating valve, 7, might,thereforcfif desir be interposed, Without variation "of operativeprinclple or result, betweent e service pipe, 6, and the Supply valve,60,i instead of, as in the instance. shown, betweenuthel supply valveandthe main burners.

In the operation ofn water heater em- 'hodying my invention, thereduction of pres- 'sure on the'outlet side of therpist'on, 57,rcsultant upon the drawing o of Water from the heater at' the deliverycock of the outlet ipe, 12F, causes the iston, 57to be moved downwardlby the igher pressuren the Water supp y pipe, 56, thereby uncovering theports, 58,- or unseatng an indepen water supply valve, 57", as the casemay and dn'iittmg a, sup 1y of' water-to the v heater coil equal toi tetA which was with drawn therefrom. Thegas supply vulve, 60, is, throughits connection with the piston 57,

'said inner tube, 13, being fixedi simultaneously opened, and admits onslo 14, which 1s composed of less expxmsihle the main burners, 4, atwhich it is ign-ritmi by u f the piston,

l scapa- 1' the flame ofthe pilot burner, 5, and, by its combustion,imparts heat to the wuter in the coil. So long as water continues to bedrown from the heater, the admission of iva-ter to the heater coil, andof gus to the mein burners, Will continue, the water valve and gussupply vulve renulining open, und the supply ot' gus being regulated bythe regulating vulve, T. es controlled by its thermostut. Upon thecessation of the delivery of water from the heater, the pressure on thelower side of the piston, 57, will thereby be rein'- steted, and thepressure of the water in the su )ply pipp, 5G, not being then suiiicientto ho( the pistou 57, in position to maintain the flow of water und gasthrough its ports, 58, and the port governed by the gas suppl' vulve,60, respectively, the spring, 62 will sent the vulve 60, thereby cuttingon4 the supply of gesto the main burners, through the connections ofsaid valve with 5,7, move said piston into position to cut oi the flowof Water to the heater coil.

While the specific form of the invention above described is designedmore articulerly Afor heating water to heV wit drawn from theappratus inthe form of hot wter',

i 4it will be at once pparent to those skilled the mein burners areebove 212 F. 'Moreo er,

. from the hesiter,-

in the art that he invention isiqually applicable to thehe ting of waterto convert it into steam forp \wer, heating,

cae, in which lager event` he coils. would e constructed stj enough to,withstand the thermostat set to act at any de'Sired degree oftemperature it will be apparent' that While gas is refer y d less anyother suitable fuel capableof being conducted to the burners by menus ofe suit. able conduitv und its' How contgolled by suitf able valves-Would be within the spirit of the invention. i

My invention is of substantial advantage in practice, both in preventingwaste of gas by reason of unnecesse combustion thereof et the mainburners, un inrguarding against- 'dxnnnge resultant upon accidentalirrite!"-A ruption of Water supply to the heater, or upon excessiveapplication of heut, due to the sticking ofthe piston und the consequentunrestricted admission vof gus to the mein burners. If water' eitherinthe form of hot wei-ter' or inthe form of'steum is not 'drown no gusis supplied' to the mein burners, and there no consumption of gsi-sduring the periods in which hot water or steam is not dru'wu orneededexceptthe" comparatively smell volume W ich is required tomaintain n Hume et the igniting or pilot burner. A material economy isthus effected, vus compared with u hee-ter in which kept constantlylighted. The provisionof means for regulating and controllingl thesupply of gus to the mam 4, und,

or other pur V to in the foregoing description as lthe ulemployed,neverthe-V Jof te' 4peinture in l the tuute wter receptacle,

same, a water supply con conduit, a water actuated element, ai thermo-`hurners, lindependently' of its udmifssion thereto by u main supplyvalve actuated by n water pressure piston, affords an effectualsafeguard against overheating und damage i to the heater und connectedpiping due to nef cidental interruption of `thcivnter supply by reasonof the sticking of the piston or derzuigeinent of the Wsiter supplymechanism. The liability to failure of water supply, or' t0 excessivelieuti11g,dueto derungement or defective operntion of the mechanism,und. the dumno'e resultant thereon, have heretofore been round to beserious objections to heuters in which water pressure o'iemted gassupply vulves are employed, and bythe independent and ositive control ofn regulating valve and t iermostat which is provided in m invention,,heaters of this type are ren ered safe and reliable. VIt wi-ll be seenthat ifthe piston should, `from any cause, or otherwise renderedinoperative while the gas supply Vvulve was o Yn, the thermostat wouldimmediately an automatically uct u on the re ulating valve, and by`cutting yo the supp of gas tonthe main burners, prevent any emnge to theheater coil or its connections.

be stuck fast,.

i I claim es lmy invention and desire to zie-v cure by Letters Patent:

- 1. In a. water heater, the combination of a water reeeptuclefhavingaaninlet and outlet, a burner for heat-ing the same, a fuel supply conduitleeding'to seid burner', means wet-uated by the water and controllingsaid fuel andindependent' means controlling sul nel `supply and operatedby veriutionsV vwut/er receptacle., 2; Inga wetereuter, the combinationof a. water receptacle having an inlet and outlet, a. burner for heatingthe same,e fuel supply condvit lendingV to' seid burner e motor acvbythe'wuter and controllingsaid fuel "und independentfmeans controllingZiet supply and ofpermted by vuriatimis of' temperature in thewut/erreceptacle;

' .6. In a `water heater,

stat, and e Iplurality of independent vulves inthe fuel suppl conduit,oneo'f said vulves being controle ,by seid element and the otherhy saidthermostat ft. In e water heater, the combination of awater`rec'eptncle, a, burner for heatin tli'e same. u, water supply ande fuel supp vlve operated mitometicaily upon vcrus tions of preseureinthe walter of the water receptacle and controlling said fuel supp mdindependent means controlling the nel supply peruture in the waterrecept-'aci En e water hea-ter, the combinatih of n 'theeomblnationofa.- a burner for heating 'the duit, ai fuel supply and operated byvariations of temwitter receptacle having an inlet. and outlet,

n burner for heating the seme, e gas `supply valve controlling tlwater'receptacle a burnerfor supply VIL .35 burner inde endent i '5oloc'mtrollin'g the 55 vvatejreceptacle havingl valve controlling thesupply of 'gas to the burner, a piston operated y unbalancin the waterapressureI on opposite 'sides thereo a. actuating said gas sup'pl valvea regulating e flow of, gas tothe ntly of the gas su'ply burner indepenator valve, and a thermostat or thermal regu actuating the reulatingvalve.

6. In a water" eater, the comb ation of a ating the same, a gas s u p yvalve controlling the iow of gas 'to the, urner, a water supply valvepistonactuated by the supply of water to the water receptacle uponvariations of pressure therein, means tliroughwhich the opening of thegas'supply valve vis eieeted by the water ve piston, a mgnlating valvecontrol ing the flow of gas to the burner independently of said gassuppl val-Me', and a 2o thermostat or thermal regu ator actuating theregulating valve.

7. In a water heater, the combination of a, dater receptacle, a burnerfor heatin the saine, a gas su ply .'valye controlling t How of gas tothe' urner, a`watersupply 'Valve piston actuated by the supply o waterto the water, rece tacle and upon' variations of pressure thawing-meansthrgu h which the opening of thelgas supply va ve iSeRecte/d.

ao by the'waterrsiipply va ve jeton, aspiring bearin on the 'gas su plyve and acti to eietpthe closure thlreof and the shitiiig of thewater-sup ly 'valve on a regulating valve controilin the of gas to theof the gas su ply valve, and a ermostat or thermal ator actuating theregulating valve.

8. `In` a water eater, the-combination of a 'water receptacle, a mainburner for heating 4o the same,'a water inlet `for sa'dreceptacle, a

pilot burner for the inain burner, a as service vi'peana branch pipeconnecting l l?, e ses ,ce 4iili'nviltli thev Pilot burner; a

valye controlling communieation4 35 SUPP A4E tween `t vegas pipe and thelmain humana pieni@colintechniV to and aetuaig said gas V,ply value andac tnatednby unbalancing t 'ei-Water pressurevwithin and without saidrece'ltacle, a regulating `valve caff of to 1 the rrian burnerindependently of the gas sii ply valve,i and a thrlIIQvStat ortherniairregll littor 4actuating the ieulatinl valve'. 2- y 9. In awater eater, t e combination of a 4 aninlet and outlet, a biineriorheating the same, a fuel snp ly Y, conduit leading to. said burner,means ac i1- ated"by th, walter and Controlling said fuel supply,independentv means controlling said fuel sup 1y, and a-thermostat in thewater' reeeptace and in operative relation with said independent means.

' 10. In'a water heater, the combination of a Waterreceptaole'corisisting of a coil having G5 an inlet and outlet, a immerfor heating lthe same, a fuel supply conduit leading to .said burner,means actuated by the water and controlling said fuel su ply,independent means controlling said nel suppl and a thei'mostat'in thecircuit of thecoil and in operative relation` with said independentmeans.'

1l. In a water heater, the combination of a water receptacle consistingof a coil having an inlet and outlet, a burner for heating the saine', afuel supply conduit leading to said burner, means actuated by the waterand controlling said fuel supply, independent means coptrolling saidfnclfupply, and `a thermostat 'in'the ontletp0rti0n ofthe coil and inoperative relation witli said indef` pendent means. y

12. In a Huid heater, the combinationof a receptacle havin a water inletand an ontlet, a burner for eating the same, a fuel Veupply c ndnitleading to said burner, means actua ved by the water and controllingsaid fuel snpalr, and independent means controlling sai uel supply andoperated by variations of temperature in said receptacle.

13. In a fluid heater, the combination of a receptacle, 'a burner forheating the same, a water supply conduit, a fuel supply conduit v awater actuated element, a thermostat, and a plurality of independentvalves in the fuel supply conduit, one of said valves being control edby said element and the other by said thermostat.v 'l

14. The combination of a, receptacle, a burner for heating the saine,-awater ,supply and a fel su ply, a valve operated automatically by t e`water upon variations of trolling the u'el supply and o erated byvalriatio'nls of tem erature in sai receptacle.

15. Tliecom inatioi'i of a .fluid receptacle, means for establishing aHow of ai Huid therethrough, a burner for heating the same, a ,fuelsupply conduit leading to saith burner, a valve or governin said fuel su1y conduit, means actuated y. the fluid while iiowing for opening saidvalve, said valve nrmally, being returned to its closed position whenthe-dow of the fluid ceases,'and.inde

` 16. In a fluid 4heaterythe'combination of a receptacle, having awaterinlet and an outlet,a burner for 4heating the saine, a fuel supjly valvecontrolling the su ply of fuel to be burner, a piston operated ynn'balancin the Water pressure on opposite vsides thereo and actuatingsaid fuel su ply valve a rogu- ,lating valve controlling t e How 012ftiehto the burner independently of the fuel supply valve., sind athermostat or thermal regulator' actuating the regulating valve.

. 17. In a fluid lieater,.the combination of n pressure in, saidreceptacle.v and Acontrolling said fuel supply and independent meansconpendent means forfcontrolling Vsaid fuel s'upf' 4 ly and operated bvariations of temperareceptacle comprising a coil having a. water inletand an outlet, a burner for heating the same, a fuel supply conduitleading to Said burner, means actuated by the water and con. trollinsaid fuel su ply, independent means i controing said fuel) supply, and athermostat in the outlet from the coil. and in operative relation withsaid independent means. 18. In a fluid heater, the combination of areceptacle, a main burner for heating the Same, a Water inlet for Saidreceptacle, a pilot burner for igniting the main burner, a fue] servicepipe, a branch pipe connecting.;l the fuel service pipe with the pilotburner, a fuel supply valve controlling the communication between thefuel service pipe and the main burner, a piston connected to andactuating said fuel Su ply valve and actuated by unbalancing tlie Waterpressure Within and without said rece tacle, a regulating valvecontrolling the ldw of fue] to the main burner independently of tne fuelsu ply valve and 4a thermostat or thermal regu ator actuating theregulating valve.

EDWIN RUUD. lvitnesscs J. SNowDnN BELL, CLARENCE A. WILMAMS.

